Answer:
D
Explanation:
Edward Gibbons paints a vivid picture of that preceding scenario. He affirms: "Roman citizens and subjects had purchased their exemption to defend their country", leaving that duty to Barbarian mercenaries. Furthermore, foreign soldiers who conquered military victories and wealth were gloriously seen in Rome.
Little by little, the famous "Legio" (legion) began its collapse with more and more Barbarian mercenaries as recruits. These "new" soldiers have little or no loyalty to Rome but their ambitions. Turning their backs and sacking Rome.